Christianhansen boss



(No-Model.)

G; H. ROSS.

ILLUMINATING TILING.

No. 312,222. 2 Patented Feb. 10, 1885.

IJNiTnn STATES ArENr rricE.

OHRISTIANHANSEN ROSS, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO I1.OTIS DAUOHY, OF SAME PLACE.

lLLUMlNATlNG=TlLlNG.

SPECIFICATION forming part of Letters Patent No. 312,222, dated February10, 1885.

Application filed November 12, 1894. (No model.)

To all whom it may concern:

Be it known that I, CHRISTIAN Hansen Ross, of Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Illuminating- Tiling for Vaults, Roofs, &c., which arefully setforth in the following specification, refer.- ence being had tothe accompanying drawings, forming part of the same, in which- Figure 1is a side elevation of my improved lens. Fig. 2 is a plan view of asection of tiling containing my improvements, and Fig. 3 is a verticalsection taken on the plane of line X X of Fig. 2. My invention relatesto the form of the lens,

whereby a greater quantity of light is permitted to pass below the framethan with the usual forms, and the light below the plate is more evenlydistributed. It also relatesto the alignment of the same; also to thelocking of the lens securely to the frame.

Heretofore glass lenses have been constructed and arranged to rest upona seat in the opening of the frame, the lens being inserted from the topof the latter; or when the lens has been constructed with practicallystraight sides it has been made long enough to pass through a mount ortile and be fixed in the light-hole of the grating, and insome cases thestraight-sided lens has been supported in the frame by 'a screw-threadon the body of the lens fitting into a corresponding thread in theopening of the frame;-or the lens has been supported upon a flangeprojecting from its body and resting upon inclined projections withinthe openings of the tiling frame, as shown in patent to C. H. Ross, No.270,132, of January 2, 1883.

All of the above-named devices are attended o with some disadvantages,which I have endeavored to remedy by constructing both my lens and thelens-opening of the tile or grating in a conical form, whereby I amenabled to fix the lens securely and evenly in place, and at the sametime admit of extending the lens below the frame for the betterdiffusion of light in the vault, as will be hereinafter more fully setforth.

A is the frame, preferably of metal, which is provided with conicalperforations D, which may be either circular or polygonal, for thereception of similarly-shaped lenses.

B is the lens. Its superior surface, b, is

preferably convex. Its body ais an inverted conical frustum providedwith a flange, 0, which forms the inferior surface of the lens, andwhich is larger than the bottom of the opening D in the frame A.

At the junction of body a and flange c are three or more lugs or.projections, d, which serve to hold the lens exactly in the center ofthe opening D. The inferior surface of the lens may be convex, or asshown in dotted lines 6 in Fig. 1, or of any other desired contour. 6

To set my improved lens in the tiling or grating, the lens is insertedfrom the under side of the tiling and pressed upward against the tiling,the lugs cl serving to keep the lens concentric with the opening. Thenany suitable cement, E, is put into the conical annulus between the lensand the tiling.

It will be seen that the cement E forms a dovetail joint all around thelens, and that no ordinary blow or jolting of the lens from above orbelow will have any effect to loosen it from its seat.

The light passing through the lens is not obstructed by anyinwardly-projecting screwthreads, ledges, or inclines, or by blades orribs running across the face of the lens.

My improved lens may be made and sold as an article of manufacture to beused whenever required, or to be inserted in tiling now in use.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. A lens, B, having its body portion a of conical form, taperingdownward from its upper face, I), and provided with a flange, c, of 0larger diameter than its face b, substantially as and for the purposesherein set forth.

2. A lens, B, of conical form, provided with a flange, c, of largerdiameter than its face I), and centering-lugs d, substantially as herein5 shown, and for the purposes set forth.

3. In illuminating-tiling, the combination, with a frame, A, providedwith conical openings D, of a conical lens, B, provided with an enlargedflange, c, and projections or lugs d, IO and any suitable cement, E,substantially as and for the purposes herein shown.

CHRISTIAN HANSEN ROSS.

Witnesses:

Gno. K. DAUOHY, M. BYRON Bron.

